You should have gotten a dual-link DVI cable in the box. Dell ships these monitors with the required DVI cable.

Which would work great, if my computer wasn't behing me. I needed a 20ft cable. Ended up getting a 25' dual link DVI cable for $25 at Micro Center. Working great now! All I'm waiting for is that 20ft USB 3.0 cable to come in. Don't worry, it has a built in repeater. I just wish this thing had the media card reader the U2711 does. Seems kinda odd the left it off.